Telephone wall set.



' N 829,535. PATBNTED AUG. 28, 1906.

R. H. MANSON. TELEPHONE WALL SET.

APPLICATION FILED FEB-28,1905- 2 SHEETS-SHEET 1.

iin'.--, I Nb. 329,535. PATENTBD AUenza. 1906.

' R. H. MANSON.

TELEPHONE WALL SET.

APPLIGATIONFILED FEB- 28, 1905.

Wz'zesses UNITED STATES PATENT OFFICE;

RAY H. MANSON,

OF ELYRIA, OHIO, ASSIGNOR'TO THE DEAN-ELECTRIC COMPANY, OF ELYRIA, OHIO, A'

CORPORATION OF OHIO. 7

TELEPHONE-WALL SET.

To all whom it may concern:

Be it known that I, RAY H. MANSON, a citizen of the United States, residing at Elyria,

' in the county of Lorain and State of Ohio,

have invented certain new and useful Improvernents in Telephone Wall Sets, of which the following is a specification, reference being had therein to the accompanyin drawings.

My invention relates to te ephone wall sets, and has for its object the production of a telephone of this type which shall be very compact, using full-sized standard parts, so

that they will be interchangeable withthose of the regular full-size telephone, 5

.o en, all of the making; it air parts from the stand possible to take re ephone is also designed to ard stock. The te use the standard common-batter circuit, so

that the instrument can be used or the same talking and signaling service as the larger common battery sets. All of the working parts are concealed, within the case and otherwise protected, so that it is. impossible to injure the mechanism even when subjected to abuse.

The case is made up in two arts, each of which is of steel, drawn into s a e without seams, thus making a very rigi construction. The cover is hinged and locked in its closed position by a spring-catch. -When 'ment.

The wiring between done with nsulated wire and flexible cord sewed into a cable similar to that used in switchboard construction. Distinguishing cOlorsare used in the insulation of different wires, so that the circuit can be readily followed. All parts entering into the circuit are thoroughly insulated from the metal box and from exposed metal parts, so

that it is impossible for the user to receive a shock while using the telephone.

The condenser, which is necessary in this type of telephone, is located within the base. A metal-cover is provided to close the 0 ening of the base and protect the parts w 'ch would otherwise be exposed. This cover has two ears on its lower edge which are made to insert in perforations made in' the lower 59 P of the cover is held by a I A The metal-box telephone shown in the acwhile the upper portion single screw.

ortion of the base,

I 'companyin'g illustration is provided with an Specification of Letters Patent. Application filed February 28,1905. Serial No. 247,714

working parts of the tele-. p one are exposed for inspection or adjust Patented Aug. 28, 1906 adjustable transmitter-arm, a removable lever-hook switch, a self-contained, ringer, a balanced Wheatsto'ne-bridge coil, and a small-size condenser of one microfarad capacity. In the circuit used the condenser is only used in ringing and for that reason can be made small. i y

In the drawings, Figure 1 is a front view of my improved telephone set with the cover opened. Fig. 2 is a face view of the formedup base-plate ,of the'set. Fig. 3 is a vertical section t ereof.-- Fig. 4 is a perspective view of the distance-piece in Figs. 2 and 3. Fig. 5 is a diagram of the circuits.

Referring to Fig. 1, A is uponv which all the parts of my improved set are mounted. This consists of seamless steel in sheet form drawn u to form a boxshaped body The design of this base is a very important part of my invention, for upon it depends the elimination of all the expensive small parts which will be hereinafter pointed out; In

-. the course of reparation of this case it has the hollow base,

with deep si es or flanges a formed in it a arge opening a. to receive the ringer and a number of smaller openingsv c for securing devices, such as screws or rivets, whereby the several mountings are secured; also,an opening a for the entrance of linewires, so as to connect to terminals on rack K; also, in the left-hand side flange an opening a", which is afterwardbushed with insulation and serves for the passage of thereceiver-co'rd. In forming up thebaseI-the upper edges of the opening a are turned in at 0. Y

to forrmfianges upon Whichthe iron yoke of the ringer-frame is bolted;

Hinged upon-the base at one side is the hollow cover A, whichisalso formed up out. of seamless steel. face the transmitter T, preferabl by'means of a ball-and-sockot joint, which, owever, in itself forms no part of the present invention. This cover has a notch or opening a l, which when it is closed takes over the lever 'of the switch-hook and is covered by the escutcheon thereof. It'also carries a latch-spring a riveted at a and-providedwith'anopeningin the cover for inserting a pin or otherpointed tool to force the latch out of enga ement with tongue a. The opposite wallb open ing a prevents spring of being-forcedin be .yond its elastic limit. When the'cover, is

Thiscover carries upon its closed, a notch or slot in this spring takes over the tongue a left on one side of the opening a in the base, this construction avoiding the use of any separate fastening device.

The rear opening of the base is closed by a cover-plate A provided at its lower end with projections a, which are slipped into the openings a and. eld at 'its upper end by a screw 0, taking into the bridge a of the dis- I0 tance-piece A This is best shown and consists of a strip of sheet metal bent up and with its ends turned over at e to take the shanks of the bolts a, which pass down through the top flange a of the base and I5 through the flanges a into the yoke q of the ringer. This bridge serves, therefore, to stiffen the flanges a as well as to secure the back plate. The screws or other fastening devices which secure the whole instrument to 2 the wall pass through the corners of the base at a" of the back plate.

Beneath the lower (part of the base A, I se-.

cure my condenser b means of. s ringclips 0 and c, the latter eing remova le or formed so they can be sprung up to insert or remove the condenser and coming down upon the upper end of clip or clips 0 to limit their play, both the up or and ower portions of these clips being of set from the inner face of 3 the base-plate to leave space for the screws or rivet-heads and sides.

The ringer is shown at Q and is of a standard type, having an iron yoke g supporting its operating parts, its gong-posts g being carried by adjustmentlates g and extending up in front of the ase-plate, the upper edges of the cover A being notched to take over them. The gon s g may be of different sizes, provided for y the adjustment of plates 9 The armature g is carried on the yoke g secured to the cores of the magnets, and the clapper-rod g passes up Vertically beneath a hood g riveted to the base A. 5 The latter is notched beneath the hood to take. the permanent magnet end 9 and the cover-plate is notched to give play to the clapper.

"Across the opening a, I spring a bridge S, secured at its ends by screws and having the lefthand end 8 turned over and slotted to form the escutcheon-plate and limiting-stop for the hook-lever. The latter is of the separable type, consisting of a main lever S, latched upon a stub 8, both being pivoted upon a grooved post 8 secured in the bridge 8,. For the common-battery type of instrument but a single pair of springs is required,

opening when the hook is down; but as these 6 o springs are mounted to form a separable unit on the stub-plate 8 they may be changed to alter the type of ins rument without removing the switch-hook. The induction-coil I is mounted below the 6 5 opening a transversely of the base, with its in- Fig. 4

bulging of the condenser i and tion a ho .terminals up for the receiver-cord ti s. The wiring from the end terminals, with t ..e transmitter-wires, is made up into a small cable i, which is arranged'so as to be out of the way and secure from tampering. From this the respective airs are taken off to the ringer, the switch-liook, and the condenser, and the line-terminals are connected below, being mounted on the terminal-rack K. From this terminal-rack connection is made to the line-wires through the opening a which may be used for this purpose only if no lower fastening device is desired, as hereinbefore mentioned.

Fig. 5 shows the circuit of the instrument. The coil I is a Wheatstone-bridge coil with the receiver R in the bridge wire. The ringer and condenser are permanently connected across the line-terminals on the rack K, but may be shifted to the switch-hook if a different circuit is desired, a middle terminal being provided to this end.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is I i 1 o 1. A telephone wall set comprising a hollow base having an opening, a hollow cover hinged thereto, a ringer and condenser mounted to lie within said base,'a brid e spanning the opening in said base,- a hooi- 5 lever and contacts mounted ,.oii"said---bridge, an induction coil andterminal-rack mounted on the base beneath-. the hollow cover, where they may be exposed as re: quired. 10o 2. A telephone wall set comprising a hollow base, having an opening and a hollow cover hinged to said base over said opening,

a rin er and condenser mounted to lie within said ase, a bridge spanning the opening in said base and provided with a shelf, contactsprings mounted on said shelf, a hook-lever pivoted to said bridge ad'acent to said contacts and an induction-coil and terminal-rack mounted on said base, below said 0 ening, all of said parts ositioned below sai cover, where they may e exposed as required.

3. A baselate for wall telephonescomrising a ho y portion. of sheet metal and anges formed thereon, an opening in the body portion to receive a ringer-frame, openings in the front and sides for the passage of connecting-wires, means to secure a ringer to the flanges, and an an ular stiffener or distance-piece held by sai securing means and 12 reinforcing the flanges, substantially as described.

4. In a tele hone wall set, the combination with a ho low base, ofa ringer, means for securing the rin er to said base, and means secured by sai ringer-securing means to the base, whereby a back plate may be. attached.

- 5. In: a telelphone wall set, the combinaow base, having a flange of a I ringer, means for securing said ringer to said flange, a distancepiece, and a closure-plate secured to said distance-piece, said ringer-securing means also securing said distance-piece to the base.

6. In a tele hone wall set, the combination with a ho low base having a flange, ofa ringer-yoke, a distance-piece, means securing the ringeroke and the distance-piece t0 the flange, an a back plate secured to the base and to the distance-piece.

7. In a tele hone wall set, the combination with a ho ow base having a flange, of a ringer provided with a yoke, a distance-piece having looped ends, screws passing through 15 said looped ends and engaging's'aid yoke to secure both the/yoke and distance-piece to the flange, and a back cover-plate secured tothe base and distance-piece.

In testimony whereof I afiix my signature 20 in presence of two witnesses.

RAY H. MANSON.

Witnesses:

H. E. KRAUSE, J. C. BRONSON. 

